The MESA 7I93 is a low cost, general purpose, FPGA based programmable I/O card with 100 BaseT Ethernet host connection.   The 7I93 has a simplified UDP host data transfer system that allows operation in real time if required and compatibility with standard networks for non-real time applications. Firmware modules are provided for hardware step generation, quadrature encoder counting,  PWM generation, digital I/O,  Smart Serial remote I/O, BISS, SSI, SPI, UART interfaces and more.  All motion control firmware is open source and easily modified to support new functions or different mixes of functions. All I/O bits are 5V tolerant and can sink 24 mA. All I/O pins support 3.3V LVDS signaling. Pullup resistors are provided for all pins so that they may be connected directly to opto-isolators, contacts etc.   The 7I93 has 48 I/O bits available on two 50 pin connectors, all connectors use I/O module rack compatible pinouts and are compatible with all Mesa 50 pin FPGA daughtercards.